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  1. #741
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    If that's an old wrought anvil (most likely) it was very common to make those in two main pieces- the top and the base. (Three pieces total when you count the hard work face plate.)

    Hazarding a guess, I'd say whoever made that (probably about a hundred years ago) got an imperfect weld between the top and bottom pieces, and eventually just use, vibration and wear cracked the weld through.

    Luckily, old wrought welds nicely with modern techniques, like MIG or stick. You can vee that thing out deeply and stick 'er back together with plain MIG wire. You don't have to weld it fully, and you o want to be sure not to overheat the body- you could draw the temper out of the top face plate.

    Doc.

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  3. #742
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    Quote Originally Posted by Mud View Post
    I'll just leave this here -
    Is that the new harbor freight anvil?

  4. #743
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    Quote Originally Posted by Mud View Post
    I'll just leave this here -
    Got a visit from Thor?

  5. #744
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    Custom crankshafts in process.crankshafts-002.jpgcrankshafts-process-1.jpgcrankshafts-process-2.jpgYouTube

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  7. #745
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    A few sexy mold cores fresh off the Hermle
    Attached Thumbnails Attached Thumbnails 804202.jpg   804201.jpg   804203.jpg  

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  9. #746
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    I kan't imagine the hours (days) of cycle time put into that!


    -------------------------

    Think Snow Eh!
    Ox

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  11. #747
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    Just imagine the hours/days some fool is gonna have to put into that with stones and rubber abrasive sticks!

  12. #748
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    Unbelievably beautiful! wow!

  13. #749
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    Quote Originally Posted by Perry Harrington View Post
    Just imagine the hours/days some fool is gonna have to put into that with stones and rubber abrasive sticks!
    Years ago I worked in a mold shop................99% of the polishing was subbed out. The place that did it had about 5-6 gals doing the work. The owner said ladies where the best at it.................just much better attention to detail and they didn't get carried away and over polish, rounding sharp edges or ruining parting lines/shut offs..........................

  14. #750
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    Quote Originally Posted by david n View Post
    Years ago I worked in a mold shop................99% of the polishing was subbed out. The place that did it had about 5-6 gals doing the work. The owner said ladies where the best at it.................just much better attention to detail and they didn't get carried away and over polish, rounding sharp edges or ruining parting lines/shut offs..........................
    And they can do it while all 6 are chattering away nonstop. I knew a wiring harness shop like that, and knew a fiberglass shop that had women laying up small molds while watching soap operas on a TV mounted near the ceiling, again talking nonstop, very few errors or rework.

  15. #751
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    Where i did my apprenticeship it was an instrumentation company - most were girls on assy.
    Also i had a customer with a prod line which were small gearboxes - girls again.

  16. #752
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    Quote Originally Posted by Perry Harrington View Post
    Just imagine the hours/days some fool is gonna have to put into that with stones and rubber abrasive sticks!
    The finished part will be a light textured finish, so hopefully the polish time is minimal.. I will hear about it if it's not.

  17. #753
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    Our challenge today, boring a .060 " hole .46 deep in copper nickel, 103 parts. Can't show the part, but here is the boring bar and a cross section view.
    boring-bar.jpgcross-section.jpgThank goodness for PH Horn. Off the shelf solid carbide bar. Worked great, only bored .004 out of the hole, but that was a little delicate to dial in. Runout to some other features .002, so had to bore it. We made it using only 2 bars. And the first one broke because we snapped a drill off and didn't realize it. Crunch. We also did the .02 r and .010 by 45 chamfer with the tool (main and sub spindle used a boring bar).
    Attached Files Attached Files

  18. #754
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    Copper Nickel is one of the worst materials I've ever machined. Getting the chips to break and flush out at that Depth and Diameter must have been a challenge.

  19. #755
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    Quote Originally Posted by RJT View Post
    Our challenge today, boring a .060 " hole .46 deep in copper nickel, 103 parts. Can't show the part, but here is the boring bar and a cross section view.
    boring-bar.jpgcross-section.jpgThank goodness for PH Horn. Off the shelf solid carbide bar. Worked great, only bored .004 out of the hole, but that was a little delicate to dial in. Runout to some other features .002, so had to bore it. We made it using only 2 bars. And the first one broke because we snapped a drill off and didn't realize it. Crunch. We also did the .02 r and .010 by 45 chamfer with the tool (main and sub spindle used a boring bar).
    Better you than me.........................

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  21. #756
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    Well, I guess it was cool to me, some of the first chips on my mill when I started using it.


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  23. #757
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    Anybody remember the four cylinder Mercury outboards that have been made since the late '50's. I use them on hydroplanes, the Mark 58 especially. I am using a turbocharger on it (yes, turbos work on two strokes) and the turbo can very easily double the hp. This is a 7075 alum. crankcase I made for it.2012-12-28_13-35-44_739cc1.jpg2012-12-28_11-22-52_706cc2.jpgcc3.jpg For over 25 years all of us figured a supercharger or a turbo couldn't work on a two stroke due to the exhaust port being open the entire time the intake or transfer port was open. We figured the charge would just blow through the cylinder and there would be no pressure boost, we were all wrong, we were missing one simple thing.img_20191206_103647386tur.jpgimg_20191206_103635103ty.jpg

  24. Likes cnctoolcat, ratbldr427, eKretz, 3512B, Bobw and 2 others liked this post
  25. #758
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    x--heckuva nice piece of work.

  26. #759
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    Fella's have been puting sidewinders on sleds for > 20 years that I know of.
    And they are on/off the throttle.
    I'm guessing that you put it to the wood and leave it there?

    Doo actually came out with an OEM turbo on their 850 Summit back in January.
    But that is direct injection, so that almost doesn't even count compared to carbed and tuned pipes.




    --------------------------------

    Think Snow Eh!
    Ox

  27. #760
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    Was that crankcase done on a manual mill?

    That is the strangest looking turbo. What is it?


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